The problem with chantix is that it simply fucks with your brain's pleasure receptors.
it makes smoking not pleasureable... but it also makes everything ELSE not pleasurable either.
hence, people getting emo and suicidal.
The real problem, is that once you stop taking chanitx, your brain opens up to pleasure receptors again and your body will start craving the smokes again.
so, it's a decent way to quit and to get you rbody off it, but you have to WANT it after your done taking the pill.
Everyone i know who took it quit, but has since re-started again.